<!DOCTYPE html >

<head>
	<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
	<title>模拟select控件</title>
	<style>
		html,body{height:100%;overflow:hidden;}
		body,div,form,h2,ul,li{margin:0;padding:0;}
		ul{list-style-type:none;}
		body{background:#23384e;font:12px/1.5 \5fae\8f6f\96c5\9ed1;}
		#search,#search form,#search .box,#search .select,#search a{background:url(search.jpg) no-repeat;}
		#search,#search .box,#search form{height:34px;}
		#search{position:relative;width:350px;margin:10px auto;}
		#search .box{background-position:right 0;}
		#search form{background-repeat:repeat-x;background-position:0 -34px;margin:0 20px 0 40px;}
		#search .select{float:left;color:#fff;width:190px;height:22px;cursor:pointer;margin-top:4px;line-height:22px;padding-left:10px;background-position:0 -68px;}
		#search a{float:left;width:80px;height:24px;color:#333;letter-spacing:4px;line-height:22px;text-align:center;text-decoration:none;background-position:0 -90px;margin:4px 0 0 10px;}
		#search a:hover{color:#f60;background-position:-80px -90px;}
		#search .sub{position:absolute;top:26px;left:40px;color:#fff;width:198px;background:#2b2b2b;border:1px solid #fff;display:none;}
		#search .sub li{height:25px;line-height:24px;cursor:pointer;padding-left:10px;margin-bottom:-1px;border-bottom:1px dotted #fff;}
		#search .sub li:hover{background:#8b8b8b;}
	</style>
	
</head>

<body>
	<div id="search">
		<div class="box">
			<form>
				<span id="select" class="select">请选择游戏名称</span>
				<a href="javascript:;">搜索</a>
			</form>
		</div>
		<ul id="sub" class="sub">
			<li>地下城与勇士</li>
			<li>魔兽世界（国服）</li>
			<li>魔兽世界（台服）</li>
			<li>热血江湖</li>
			<li>大话西游II</li>
			<li>QQ幻想世界</li>
		</ul>
	</div>
	
	<script type="text/javascript">
		select.onclick = function(e){
			console.log('select click')
			sub.style.display = 'block';
			
			e.stopPropagation()
		}
		let oLis = document.querySelectorAll('#sub li')
		for(let i=0;i<oLis.length;i++){
			oLis[i].onclick = function(e){
				
				select.innerHTML = this.innerHTML
				sub.style.display = 'none';
				
				
			}
		}
		
		document.onclick = function(){
			console.log('document click')
			sub.style.display = 'none';
		}
		
		
	</script>
</body>

</html>